'Hindenburg Omen' Flashes

Forget about Friday the 13th. Many on Wall Street took to whispering about an even scarier phenomenon—the "Hindenburg Omen."

The Omen, named after the famous German airship in 1937 that crashed in Lakehurst, N.J., is a technical indicator that foreshadows not just a bear market but a stock-market crash. Its creator, a blind mathematician named Jim Miekka, said his indicator is now predicting a market meltdown in September.